Toni Petrova focused on enhancing the security of the openmfp/portal-ui-lib repository by addressing a Cross-Site Scripting vulnerability in the navigation header. She implemented a solution in JavaScript and TypeScript to sanitize user-generated names, ensuring that potentially malicious HTML content could not be rendered. To validate the fix, Toni added targeted automated tests, demonstrating a strong emphasis on both front end development and security best practices. Her work improved the code quality and security posture of a shared UI library used across multiple applications. This contribution reflects a thoughtful, test-driven approach to solving real-world security issues in production code.